In a far off somewhere, there are designated entry points designed expressly to filter. Those that meet the criteria are allowed to pass through. Those that don't? There are ways of convincing them they never meant to be there. These are some of the stories from the most used entry point.
Jeff Sampson: voices and constructions http://www.jeffsampsonmusic.com
Mystified: flutes and trombone http://www.mystifiedmusic.com